Evangeline Lilly, best known for her turn as Kate Austen on ABC's hit drama "LOST," has opened up on her battles with clinical depression - and the solutions she found to help overcome it. 

"I have battled clinical depression and have come out of the other side. I've been free of it for many years now," the 34-year-old told Digital Spy

Instead of using medication to help control her mental state, Lilly experimented with a green, organic diet

"Going from eating whatever to eating primarily organic food, I was astounded what a difference that made. After about a year or two years, I started to feel something physically lift out of my brain, and I believe it was all the chemicals I was probably ingesting [before]," she said. 

According to a recent study, foods such as refined grains, soft drinks, and fast food can all contribute to increased depression. The study also found that the more depressed people are, the more likely they are to turn to poor sources of nutrition - creating a closed loop of poor mental well-being. “Although more studies are necessary, the intake of this type of food should be controlled because of its implications on both health and mental well-being,”Almudena Sánchez-Villegas, lead author of the study, said in a statement. 

For Lilly, currently starring as the elf Tauriel in "The Hobbit: The Desolation of Smaug," overcoming depression has made all the difference. 

"Finding the place in my own mind and heart to win that battle without using medication, finding the place within myself where I could be alive again, that was one of the biggest challenges I've faced," she said. "I would rather pretend to be happy than allow myself to be miserable. It's sort of the idea of 'fake it till you make it.' Put on a smile until you believe your own smile. That's a big part of it."

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